When it comes to the Reformed Changelings, they began to thrive- soon driving away from merely copying the ponies traditions such as Hearth’s Warming or Nightmare Night.
King Thorax declared that instead of simply the Changeling Kingdom, their land would be named ‘Tarsus’ (which is a part of an insects leg, fun fact)- which especially came into play after the return of Queen Chrysalis, who wanted to recreate her own hive as a seperate Changeling Kingdom of sorts- which ended up being named ‘Tibia’ (another part of an insects leg).
Sir Pharynx became head of the protectors of Tarsus, which is mainly compromised by those who did enjoy fighting within the old Hive prior to reformation. Thorax offered him the title Prince, but he refused- happy being merely a guardian- however he is still considered royalty to some extent.
Princess Ocellus was meant to be the next Queen of the Hive prior to reformation, and Thorax recognized this- eventually taking her as an apprentice and heiress. Ocellus is often found wandering Equestria- creating friendships among other species and keeping up the strong relationship between the Changeling and Pony races.